ADI & MDI Manual PDF

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Specifications	ADI & MDI Manual PDF
Business section

INDEXEDDATAITEMS TheIndexedEmbeddedDataItemfeaturerepresentsoneofthemost versatile,andpowerfuloftheADI/MDI’scapabilitie

Specifications	ADI & MDI Manual PDF
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Content	INDEXEDDATAITEMS TheIndexedEmbeddedDataItemfeaturerepresentsoneofthemost versatile,andpowerfuloftheADI/MDI’scapabilities.Theunitcanstoreup to96IndexedDataItems,numbered0to95.Eachitemcanhold126bytesof variabledata,plusalengthbyteandastringterminatorbyte,foramaximum sizeof128bytes. YoucanprogramaMessagetocollectthedataforanIndexedItemfrom anyoftheEmbeddedDatasources.WheneveraMessagecollectsanIndexed DataItem,theADI/MDIfirstdeletestheexistingdatafortheIndexandthen storesthenewdataattheassignedIndexlocation.Commandsandother MessagescanthenaccessthestoreddatabyitsIndexNumber. YoucaninsertIndexvaluesinMessagetextandMessagetransmissions,in RequestStringsandInternalItemformats,andinCommandandCommand Messagedatastrings.IndexedItemsareaccessedbytheirrespectiveIndex number.ToinsertanIndexvalueinanyoftheprecedingfunctions,you simplyincludetheINDEXCONTROLCODE,“ i”(ALT-I),followedby thetwodigitnumberofthedesiredIndex.Forinstance,toinsertthevalueof Index01inaTransmitRequest,youwouldinsertthecharacterstring“ i01” atthedesiredlocationintheRequeststring.(SeeMESSAGETEXT,page32, andFORMATTINGTRANSMITREQUESTANDINTERNALITEMS,page 28,fordetails). OneIndexcanstoreasingledataitem.However,youcanusetheInternal ItemDatasourcetocombinemultipleIndexvaluesintoasingleIndex. Example:GiventhefollowingIndexvalues: INDEX01:“257.3F” INDEX02:“246.6F” INDEX03:“252.1F” YoucouldcombinethesevaluesintoasingleIndexbycollectingan InternalDataitemforanotherIndex,sayIndex21,aftercollectingthedata forIndexes1through3.Toaccomplishthistask,youcouldprograman InternalDataItemwiththefollowingITEMFORMAT: ITEMFORMAT:“Unit1: i01Unit2: i02Unit3: i03” AftertheADI/MDIassemblesthisIndexedItem,Index21wouldcontain thefollowinginformation: INDEX21:“Unit1:257.3FUnit2:246.6FUnit3:252.1F” YoucanalsousetheInternalItemDatasourcetoadda“timestamp”toan IndexedItem. Example:TheADI/MDIcollectsapressurereadingeveryhourandstoresit inIndex01.Youwanttheunittoincludethetimeofthereadingwiththe datainIndex01.Toaccomplishthistask,youcouldprogramanInternal EDItemwiththefollowingITEMFORMAT: ITEMFORMAT:“ cHH:NN:SS Unit1: i01psig” TheunitassemblesthenewEDItembyinsertingthecurrentvaluesofits RealTimeClock(RTC)intotheCurrentTimefieldspecifiedintheITEM FORMAT,andbyinsertingthevalueofIndex01atthatspecifiedlocation. ThenewEDItemisthensavedinIndex01,overwritingthepreviousdata. GiventhefollowingvaluesfortheCurrentTimeandIndex01: CURRENTTIME:Friday,August13,199309:57:05.23 INDEX01:137.4 ThenewvalueofIndex01wouldlooklikethis: INDEX01:“09:57:05Unit1:137.4psig” AnyIndexedItemcontaininganumericfieldcanbeincrementedand decremented.Inotherwords,youcanuseanIndexasaneventcounter, incrementingtheIndexeachtimeacertainconditionoccurs.Youcanperform valuecomparisonsonIndexes,resultinginconditionalMessagerequests. Thus,youcanimplementanIF-THEN-ELSEMessagerequeststructureand assembleconditional,branchingMessageChains,suchasimplementingan IndexasaloopcountertocontrolthenumberoftimestheADI/MDIexecutes asequenceofMessages.(SeeCOMMANDC09,page89,fordetails). YoucanuseIndexedItemsasvariablesinTransmitRequests,Internal Itemformats,andCommandMessagedatastrings.Ifyouhaveanapplication thatrequiresarepetitiveseriesofevents,suchascollectinghourly temperaturereadingsfromseveralunits,andstoringthosereadingsin consecutiveIndexlocationsforlaterretrieval,youcanprogramthissequence inaChainofMessagesandCommandMessages.(SeeIndexSubstitution underCOMMANDMESSAGE,page99,fordetails). -52-
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Following Datasheets	ADI_MDI_manual_1 (152 pages) ADMC8_bro_de-2 (6 pages) ADMC8_bro_en-2 (6 pages) Ads-2 (2 pages) ADS_ADHS_Fallbericht (3 pages) adv0001 (1 pages) adv0003 (1 pages) adv0009 (1 pages) adv0012 (1 pages) adv0217 (2 pages)
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